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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80bf512d5b60c2b6725a8c1f47a0313e017a3f2f8bdb15f3e5c80a29ff215934' 
  AND token = 'wR8Wu2celTrOcofLPS/2H06u2BVpV4OBttijRbFsXvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}