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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9044f4b99750d130c617ed3b79b2b1aed79696857b6b7915e8f39bf6c1680aca' 
  AND token = 'IqXFqJDzsuSMYkuAb40jwnaHyViMD/AdvGE3WIkNvQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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