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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '035ceacb0ef24b35ca7a829d0cf138493b96c9633ef5fae060f274e4606900e7' 
  AND token = 'csdjFk2t9DmkmajqGlEW5uMCG+R8vXcCIX/XpXseXgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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