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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7060d8a422e18b6d8e468f62f938d477ea5a1ff2fd56ad635fc6f2cca4b2d1c5' 
  AND token = '8T0xZqUuyPxF6OemasDVRwvQep61UmyRruHuQUkZQA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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