Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61e77aeab9d26dd91f11291522a5ad585c61f273aeaebcbd948af64e3320766e' 
  AND token = 'k9UIQi/90DdXK1BzaPGiLdmjJHaEsmHWYsnrQipb4hQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}