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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd31064fcd3cca911c133344b9d1364c5e687dfb1863c1d485b5e641761bfb806' 
  AND token = 'nSAGUZ+aIixNcs/Yft43N2LMZxxCLqLA9N+Dc2oc8yg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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