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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd655d903fc05cc7b2ef909f1230068a7081fe0dddcce17bde4706ed68e38f3df' 
  AND token = 'solsjEsfqN2gm6mK1JsQy0XWUxn1u+d7arfJDTNFsBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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