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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79020a9cb19893c59ef96ac2ad4293830f3da324675ad6fb940b9dad7fa3a776' 
  AND token = 'v3jBGxIYl2GTpHwS+omSTakyaGU7yKOoT/x294fMQck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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