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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e012a6af3f5ff5ff60c1311a105814ed2d44150060e023f7c7d6152187f60d4' 
  AND token = 'KslZD8oPgXy6R3sEG7s982SHzgq5Nigdk7/JnUvBNKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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