Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9344c8c2efaf2b17ec3d9313d4942e3637ee6917d3b7044b1aa174e0db3413ae' 
  AND token = 'ZsjBdZpFXcV2lu3Paf8F1PhL5WB4CcdS+t06td1CmxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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