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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa95db00e1c6be64a4f5dd30c79f82b9e0cd1092a74e61b189f1596380e04534' 
  AND token = 'mQzjNzu9jV2lZjvg/15dZ4E7FFMwpdNE6H121GUnEMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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