Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c08d87ce7cd5733d805c6a552d46001a2db121b04efa02ce88773e5622efe8c' 
  AND token = 'KfHpAmPS+6Co52StEMDFPX0A+1MikFohCV5oyn7+o5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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