Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e512bc9a23c62defab8d1976d49cce3740d1bd336cb078912a6b3999f0b24f0' 
  AND token = 'FqIPfcrzGFHiOlzzmvNs9/sNon5Out8hi0Bqrxiqzbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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