Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '897b8e8dafa11c9917c4306f6ffb98b5d9e55469e8f6a17d2f99403fe0235c05' 
  AND token = 'cdBiDfKiPH3CypZV2/iEYUwiPO+4roKkqDV2dS429Zo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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