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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef1ecd1623314c58b28b86646d36d40e0b2ef7f6975b4128d25b4bff26ce7b0b' 
  AND token = 'h7Fos8TdCwQBz/F3wLwg3QLA3EJsskzZML1UtLXzoSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00076

JSON explain

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