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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9677a208fe1c4b72b598694e83882a9a8ce73afcae522c1dd1273fc6d58b55e2' 
  AND token = 'BrEGNK8t8aZCKlP9G8wruNhK2Cy9x14KgLaNarvti24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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