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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4879dc80a747e0db437e2e2b2b6d2727c0af251847bbb56f57f349e538b4326' 
  AND token = 'Jk/CvP71NaKAGHx4MDI/+nWtWBC+z79SO+MxY5PbJIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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