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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '121acbb3c0c91745d72fef603a0fd60500fcb128080c25d72dd62420cea79ba9' 
  AND token = '0KRZ4v2aTVbiPiwu8pfuNk5L0PPZ738HigSuXtBjte0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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