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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '737359ba9f0609bdd82b90f187a539574b1dc343a966f585761ea0e5ac12fa0e' 
  AND token = 'v+MjGnvIQE5XN4Z4YeelP6sNNjC7Ewdac4ZnD7/Z7nU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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