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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dea220538e7198dc009496d63b00b09ce48e0179213b03799bfa0043b5fc1ab' 
  AND token = 'wNTwFmwhRVAsE1cJmK2F/FuiAUSDDGr3N9xroR148q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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