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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '435e98a9830d1382da5bd09c9819f0ddd737a99f978dbb43ea2665e0253115ae' 
  AND token = '0GQ1Pt19cjj4Hy76tV5JK691fPvZUHGyNltz3mfQ9d8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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