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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af71b233c639b292b3d7abcdfc1c114504b661c394e55840ad347b8c2ae1e096' 
  AND token = 'KWMnboAxEao+iF7D/li1jS2/Uo9tKBbV/ii9SbNjTDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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