Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5d1a531be8def6b3470ffce82d0213b0544ec49df629069c076e9009fdead47' 
  AND token = 'BZAcZhkfDNpyapL3r/B3EaT1/wypi6b14IJNG5ZBiOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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