Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'b3684638654dfb608663acd68d8d32006aa1325a195087cd0588e1c0ad587757' 
  AND token = 'peW+trSKDdmRIlAZ019iGb03FGX9rW+PzVzUPZbxjQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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