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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25bb859dfb86680384074c566cfb0a07bd0721f36a9949c5c5830ece73f4152a' 
  AND token = 'd1dzCfB26xiJxLSiN8m9pqIMOcdlrEcudaPNVZzRQJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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