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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e193dbed16ed867ddd37d55ffc7df1740b03f58c5d17dfc3c528cf021cbe230e' 
  AND token = '7ysCMYaSUoly/Rxv6A4WzxTSfZpV4qUr90L9VE//WEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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