Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16ef5515ac6dcdc17d0b57d05e958635b5c0f8f2337d2a0623d57ee6197098fa' 
  AND token = 'Sl7KE4N0DM5cHbdJgaXuM7kqDfA3yrPAWp8DWSFp82s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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