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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96992ec6d5018db659caf0403de7ce916533501ba26cf35b9760be5645b16ed1' 
  AND token = 'PgHIhXeEUonYGynaLKX2+3m6NAI6k8Uv/nsTIJ47Jts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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