Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12311e134297399f35874613807b3de99d3c5062e7e4fadd048aa81f7f44df69' 
  AND token = 'rC+AIReMH2CKsSGCGW+gC4WM9PEryY3bhf16CKBYlUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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