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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63b2f8805fc508738e38f7876802d1749c8e1e700c5eed12c23c255916a8b3fc' 
  AND token = 'XF212pEr6Vhf4VEwlb3lwhijSlbXjhAlC9/5SMudKW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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