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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abd8dfa3a80fe6ebd9102ae924b4bc7d4321f9ed4732019fdd9089677f8c40cb' 
  AND token = 'Hu0jU0LXjikqXEaHhJ1NJdP9d3BIK7TvYKPlZprIu2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}