Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '631cac4132d2f810ae7d4ec611a581fa3633ccf4307a2cf7e9a0aa7ff881949f' 
  AND token = 'OmrngEGQGrO42Mrr7ZDIezCP21DtiH3dIhc1n04RGSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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