Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6c2f889c9160b5f289320b8f34d1530093539ee5d560a094847277230e52d25' 
  AND token = 'MvlnL1YSlNBdgVHCVNVArlN+up0ym5eJN32c+ib+PSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}