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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c2034d722a8987ccab5608a977c77cc90d29dae4329b7e78b28b4d6d2ed9a4f' 
  AND token = 'L2aOa07pf6JHGA5VCf4fqI3RxJyLlmabWaItXCSqAGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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