Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '809aba0ae0be51335dfa5751e07e654e4e515b3bd0f060e8cdfc4b97ef310b24' 
  AND token = 'K8UyX7HCqayXpvIBRQJmEod0JzEnqFl0clvJuufwSjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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