Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cdef43448fab272f4024fe89479e79a8263c867d660652403be7247b1e4e22c' 
  AND token = 'C2ni8dFKZSjbYShXdkfjOorBzYZTSUpjivaqgn4DtXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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