Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4a3a29089d9c2358369f0e3d63cd08754e353c9de7205e53d1ad06d803ee69a' 
  AND token = 'q2OuxG1RVq363fySkzhqMIAgvPi3Dtmb6M2aSNl3fcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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