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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7160837136686feee6a11c47582a8c063730c675e2c0ef32f688bf221bf7113e' 
  AND token = 'ntDhgcNCNeeU8qqI3SX+JjMUDQSsJx+C7cZFW/nLg2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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