Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae93e666c2aa6d7c1596a4589850dafbeea016e49a855f14533f9b162af8aa78' 
  AND token = 'xVOQjH5+Yt0lxbavzYRW32uX3vbDG48kz643tCrTCpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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