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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '16e0db06794bf9d517556a2147d62a8e02933097216b1a2009312f2bc1b38f47' 
  AND token = 'lDM6J5UqXO6ck0acx+yCfg0he3WhJbDwdtG34PFTL5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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