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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '617018274700dcadb9e292686acf0d7234b5cb019f1e25dea0c65f4b4e31fe5a' 
  AND token = 'Ga54/JAy+RKJFpCknAtUTUQ89m4LX3Ywwoxk51eSBF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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