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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b86f37038446240d8c0d82c058cb62673d080b82e04f82a0292d1dc96023a55e' 
  AND token = 'd5MM1xI4qsdOBCoHpr99si0QP/UoylTYIMteVXGwNJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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