Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a30aec0e06edb2e90865b0343ca70fc5009e2139abc78264bcac26203087be4' 
  AND token = '5zo+nvgJOrH7sbnzzgxZADK4sFRVPi4pXFBhXrJi2tE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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