Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea3f877b70e34762c55eea25e663b9037bba21452b53582cf27a3c2d452c4be7' 
  AND token = '2bVEkViNRJK2o/to0Wx0Wvxkpp/rig6XpQOF9Kr1nN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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