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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e62af4d3b2f6580b7b420964c71e8e542762577d82e86b12c520e6b386d317ff' 
  AND token = 'qJiN34Oe05FGYKcT8ikfBFoBtUx4xw8qZ9ZspTaga/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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