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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d30c6a16ce9970c0b8dd8c779b2e3695af6180d9b482c479eba7193af978451' 
  AND token = 'PndsWDwNdHV6zX7i3nZTm2H+++HXDHfEXgxNF1UyajI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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