Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8533511783c4368568b422e2182c43a4c55665e643e76b09566fd5df8f1e8988' 
  AND token = 'RB5im7sNDuqlPCFXyNg18/vM4NS0/Z6cqWiosQvEJ+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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