Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c663881abe939d477f4668eccc8b55d13ffd9722a747ab450cc32986c3475929' 
  AND token = 'iS/1bCe6QPscmnYZwRC4CEQt2d0Qlo8rOR+ixlr4Am0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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