Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d8b0b2674ad5d2b2c52955df4430e1f7bc4efcf5c7516a8ff255bbae840aaed' 
  AND token = 'iRAKbi8/Ubgidp6Ax4uPUwLjbXWaeAZrXH+Ip/d8GHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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