Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53d6629804357586a72cafde2385038b00e0d05e61fb6874924ba1010f0ed77f' 
  AND token = 'Fpdak0/Vj57OOC1jMtk1OtomX5iEzvC1VVLCIpZ6IdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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