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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd1f09e8aae76a9f1e3de03464064fe04d2023673fdac1a33d4c85a333b855ff' 
  AND token = 'Z00U6jJ5TA/gb+6im1tr+R9k56uChfS7wDIChaQe79o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00239

JSON explain

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