Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c95344427d42d00d8234e0e49cc9734152305fe906837024e1ede1c590ad1c4d' 
  AND token = 'o7MK/twQbMCUfj8yKZIXecgEgdeLwk5H5LkUqSqywzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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