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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '71743068cc778ec9a567f56573794036e67ccaa473903f75ac943a7fc9d21194' 
  AND token = 'RP6XCK0mAeq5WjG7e9tn498lMQJrd8Z6/DE2arJlu5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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