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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '18fabd97754bfce010caefdf4773a385f31c2307575aa1bfa848d84666ce18c5' 
  AND token = 'AadCl5Krw2WmTb8VrK7xfdWhNU/sV/oKCNNJr4XQ+Y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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