Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d486ae57eb19a2d630ff80bd4cecebe0301a6abb0a944ae8c7c7ad709f65433' 
  AND token = 'Cf+ADf84KSiPfVPpnCsosLLPXjV894cYTfJs3C6/WVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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