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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3429141cb96540152fcea085531dac9c2dbdb28ba12a6f4f74a8c257f83b6083' 
  AND token = 'tfesAIJjWHUJ3Wl/7piG5zfOJYtCOeFIYGh69pWKc1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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