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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1abe0dab8d3a3feb1268686371584c91af3460d61bc7a2c636b12b309c43f7cf' 
  AND token = 'edpZkUWGts6S6wMdEuOh1w0pCC7iJf/bb6lUkYMpUXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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