Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da9f40ea0e855796ab4a06d2da9680839d844c26019338c2b61cfada761a09aa' 
  AND token = '30gb4sgoe++1GYb6DQcpuSnbx1Nnqcfy0/97idF3gaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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