Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cdb0b79045155bcf30db04744ebc81d6746299ac05bff2873ad25872e9e886b' 
  AND token = 'SpgtomndcTmkV2N6oE08DD/oAoQuWHN4lVtTxLty8dQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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