Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e71dfc019a640c7ed9189a120aad5fd0eafc74ed7c86b0b308f0f4171e9b1032' 
  AND token = '23LHbvTseMrCuRDmKpTOqMu+Bb+mGi06JvxEeAMSxHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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