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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2752e63e69d5fa32fd23636266567214c35ea0d9c0aff42b7ef23a1454117c5b' 
  AND token = 'e1lPki3wLP044CSTq1FBaF3mOchlCCOv2Jhx3r9jwn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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