Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c46a7b37d0ebca085513dac26a99462b7ab17dacd69e99755ee3efe68e270978' 
  AND token = '++1DTdbvgpBM2CpFV6hbTkgfNwcPHrzKZf5ycD6yT1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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