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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '515d7e29b5dbeaf6bce303eef5ad52a1ecac3801630784a98700d667e6a11506' 
  AND token = '2TKcCnHwO6Iio5tsOZhZAYyl1ErC2oG98Hq+2+gnOzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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