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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd07be545b14695a220497ce37a206d5656710d3ccfb60d5004f3e419c208118b' 
  AND token = 'N9NPkQMR2VAUavY6YnzkP3Nt9zotXF/ZeVfXj0vXX7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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