Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '819e26d244c0b86b05d8a7648612b4f2586bc3da5bb48de83467ab846fb1245e' 
  AND token = 't55KWTNicLG3/hP2i69383odAuAWsbOtgrtrfRvS+gY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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